Drill.



R. A. CONKLING & W. R. GUIBERSON.

DRILL. APPLICATION FILED JAN. 26, I918- Patented Oct. 8, 1918.

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RICHARD A. CONKLING AND WILLIAM harm.

1,281,1l4td.

Specification of Letters latent.

Patented @ct. d, i i

Application filed January 26, 1918. Serial No. 213,959.

To all whom it may concern:

Be it known that we, RICHARD A. Corm- LING and WILLIAM R. GUIBERSON, the United States of America, residing at Tulsa, in the county of Tulsa and State of Oklahoma,-have invented certain new and useful Improvements in Drills, of which the following is a specification.

Our invention relates to an improvement in drills for extracting cores from oil wells.

The requirements of geologists to obtain samples from the underground formations in drilling wells which have not been ground up by the churn drill process, is constantly growing. They have been unable to study the porosity of the sands, the cementation and their character, as well as detect whether it contains fossils or not, due to the fact that all samples had been ground as above mentioned. On account of this we have endeavored to discover could be removed from wells which were drilled by the Standard or California method. We believe, therefore, that the drill we have devised will accomplish these results.

This drill consists of a core barrel with a drilling face at the bottom or lower end, and having slips inside that are operated by springs to seize the core and remove it intact.

In the accompanying is a longitudinal sectional view, and is a transverse section.

The numeral 1, represents the head of the drill which is adapted to be screwed to the bore of'the barrel 10, at the usual manner.

The numeral 3, indicates the spring which presses against the slips 4, forcing them drawings Figure .1, Fig. 2,

citizens of some method whereby cores the lower end its lower end 2, in

when it has raised high 10, to dislodge the pin 5. The pin 5, is inserted through a small hole extending transversely through the barrel of the drill when the slips are raised in order to hold the slips in position until the core is to be extracted. When the core has been out long enough by the cutting face of the bit marked 6, at its lower end to reach the pin 5, in the .slips, shoves the sli downward in the grooves 8, in the bore 0? the barrel and the teethv 11, on the ends of the slip engage and tightl embrace the core from opposite sides Whi e the latter is then drawn out, the lower ends of the rooves reducing in depth to cause the teetfi to penetrate the core.

The openings 7, in the sides of the barrel let the water in and out as the drill is raised and lowered 'so that there-will be free movement of the drill through the water.

The numeral 9, indicates the opening at which defines the diameter of thecore as compared to the size of the bit which will be used.

down over the core enough in the barrel then the spring 3,

RICHARD curanason', or worse, OKLOMA.

This bit can, of course, be made in all sizes,

tures.

RICHARD A. CONKLING. WILLIAM RICHARD GUIBERSON.

In testimony whereof we afiix our slgna- 

